An erect epiphytic herb.. Stems clustered, simple, covered in persistent scarious leaf-sheaths below, leafy distally, rooting at nodes, 30–80 cm. long.. Leaves oblong-ligulate, equally or slightly unequally bilobed at apex, coriaceous, mid-nerve prominent below, (7–)10–13 cm. long, 1.5–2 cm. wide, sheaths 1.5–2 cm. long.. Inflorescence 1-flowered, porrect; pedicel abbreviated, concealed by bracts; bracts 3–5, ovate, obtuse, scarious, imbricate, 3–7(–10) mm. long.. Flowers white with a green spur and brown anther, scented at night; pedicel with ovary slender, curved or gently sigmoid, 2.5–3 cm. long.. Tepals spreading, slightly undulate at base.. Dorsal sepal ovate-elliptic, obtuse, 15–16 mm. long, 6 mm. broad; lateral sepals oblong-ligulate, obtuse, 17 mm. long, 4 mm. broad.. Petals linear-ligulate to linear-spathulate, obtuse to acute, 14–15 mm. long, 2.5–3 mm. broad.. Lip rhombic, acute, conduplicate, disc carinate towards base, recurved, 16–17 mm. long, 6 mm. broad.. Spur cylindrical, filiform, geniculate and slightly dilated near base, often coiled into a loop, subacute, 8–9 cm. long.. Column oblong, with 2 triangular acute stelidia, 4 mm. long, 3.5 mm. broad; anther cucullate, emarginate, 2 mm. long, 2.5 mm broad; pollinia ovoid, 1 mm. long and broad.. Fig. 119.
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Lip 16–17 × 6 mm, rhombic, recurved, channelled, carinate towards the base; spur 8–9 cm long, slender, geniculate, sometimes with a single coil.
Inflorescences single-flowered; flowers c. 3 cm in diameter, white with a green spur and brown anther cap, scented at night.
Dorsal sepal 15–16 × 6 mm, ovate-elliptic, obtuse, erect; lateral sepals 17 × 4 mm, oblong-ligulate, obtuse.
Leaves distichous, 10–13 × 1.5–2 cm, oblong-ligulate, obtusely 2-lobed at the apex, dark green.
Stems 30–80 cm long, the lower part covered with old sheathing leaf bases.
Petals 14–15 × 2.5–3 mm, linear-spathulate or linear-ligulate, obtuse.
Pedicel and ovary 2.5–3 cm long, slender, curved.
Robust epiphytic plants, forming large clumps.
Column 4 mm long with 2 triangular stelidia.
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